Hand operated leather punching machine



G. P. CARLOCK HAND OPERATED LEATHER PUNCHING MACHINE Sept. 14, 1948.

Filed June 22, 1946 2 Sheets-Sheet 1 ]NVENTOR,. I GeoryeP far/06k 27m Mam a, (ne

:flZRA/EYS Sept. 14, 1948. a. P. CARLOCK 2,449,108

HAND OPERATED LEATHER PUNCHING HACIjI INE Filed June 22, 1946 2 Sheets-Sheet 2 IN VEN TOR.

fieorye P. (ar/ack BY Patented Sept. 14, 1948 HAND OPERATED LEATHER'PUNCHING MACHINE George P. Carlock, Jersey City, N. J

Application June 22, 1946,: SerialNo. 678,545

7 Claims. (o1. 1e4 es) The present invention relates to improvements in hand operated leather punching machine and has for an object tosimplify the procedure of achieving punching operations in leather and similar materials by a more effective hand power mechanism and by a correspondingly effective releasing mechanism for withdrawing the punch upon the accomplishment of the perforating operation.

Another object of the invention resides in providing an improved leather punching machine in which .the leather or other work is more accurately gauged to the punch and is retained in said position against any creeping toward the punch during the punching operation and therefore the invention contemplates the clean cutting and clean perforating of the leather in a sharply defined manner.

A further object of the invention is to provide an improved form of leverage and adjustment device therefor which enables the desired application of power in the most efficacious manner.

A still further object of the invention is to provide an improved punch carriergu'ided accurate- 1y back and forth in its reciprocating movements and resulting in correct punch alignment and in freedom from binding.

A still further object of the invention is to provide an improved leather punching'machine in which a novelform of leather holder or foot is associated with the punch and with a leather holder pin in a certain definite relationshipto the punch whereby the leather will be forcibly engaged and held before contact of the punch to retain the leather in position and against creeping during the punching operation; and which foot or holder also operates to retain the leather or other Work down upon the bed of the machine or upon a gauge plate which carries the leather holding pin during the interval while the punch is being lifted out of the leather to the end that the punch may be drawn cleanly and quickly away from the leather without lifting the leather with it and making difiicult the matter of separating the punch from the latter.

With the foregoing and other objects in view the invention will be more fully described hereinafter and more particularly pointed out in the subjoined claims.

In the drawings, in which like parts are denoted by the same reference characters throughout the several views:

Fig. 1 is a side elevational view of an improved leather perforating machine constructed in accordance with the present invention with the punch raised;

Fig. 2 is an end elevational view of the same taken from the right hand end of Fig. 1; i

Fig. 3 is a View similar to Fig. 2 but with the punch lowered;

Fig. 4 is a fragmentary vertical sectional view through thepunch and bed of the machine;

Fig.5 is a fragmentary perspective view of the punch adjusting detail;

.Fig. 6 is-a fragmentary sectional view taken through the fulcrum of the punch actuating le ver;

Fig. '7 is a fragmentary side elevational view. taken onan enlarged scale, showing the punch actuating iever'in its; relation to the throw adjust-- ing device;

Fig. .8 ls-a fragmentary perspective view of the bed of the machine and theadjustable gauge plate taken on an enlarged scale, and

Fig. 9 is a vertical section taken on an enlarged scale onthe line 9-4} of Fig. 2.

Referring more particularly to the drawings, 1 designates the casting or body of the machine which may advantageously be of aluminum, and

2 represents thepunch-actuating lever which is fulcrumed at an appropriate point upon such body I.

. A pair of guide studs 5 are mounted to recipro= oatesubstantially vertically through the head 2-5 of the-casting and over the bed 26 of the casting,

such guide studs having threaded on their upper ends the hexagonal or other nuts 3. A top guide bar 8 isheld between the nuts 3 and shoulder poi tions .of the guide studs 5. Coil springs 6 maintain the punch carrier elevated and are wound heli oally about 1 the guide studs 5 between the top guide bar 8 and the top portion of, the head 25 of the casting. A bottom guide bar 9 is held abutted against shoulders 21 of the lower guide bar 9 and nuts l2 which are threaded upon the lower reduced ends of the studs 5. The lower guide-barfl-carries a, tube pun-ch H3 at an intermediatepointppoised above the bed 2'5 of the casting I.

A leather holder foot or disc H is carried by a rod 28, the upper end of which is mounted. to freely reciprocate through the lower guide bar 9 and is prevented from. pulling downwardly there through by anutor head 29 A coil spring id is helically wound'about the rod 28 between the foot l and the lower edge of the lower guide bar 5 andtends to hold the detent member 29 against the upper side of said lower guide bar 9. It will be noted from a comparison of Figs. 1 and 2 that the rod 28 is longer than the tubular punch Ill.

Onthe bed 26 is an adjustable flanged guide "plate 15- held to -the bed by screws. H and having a hold guide pm Hi projecting horizontally therefrom to be engaged by the work. The screws extend through slots 30 in the guide plate I5 whereby such plate may be adjusted along the bed to various positions with respect to the punch Hi. A punch socket 39 is also provided in the bed 26 for receiving the punch Ill at the bottom of its downward descent.

pin 3-2 may hold the hand pin 19 in place, such.

pin having a head 33 at its opposite end.

Referring more particularly to Fig. an Allan screw 29 may be carried by the upper guide bar a substantially centrally thereof and in a position to be engaged by the lever 2. The head of this Allan screw 20 projects up above the upper guide,

bar 8 and a threaded socket 34 in the upper guide bar 8 enables the head of the screw to be vertically adjusted relatively to the lever 2 so as to adjust the point of contact with the lever relatively to its turning radius on the fulcrum point l9 and in this way to adjust the leverage and the force imposed by the lever upon the punch.

As also shown in Fig. 5 the Allan screw has the rectangular or other socket 335 to receive the shank 36 of an angle wrench 31.

In the use of the device, the first step is carried out by placing a piece of leather or other. work on the guide plate IS, the leather being gauged to the inside of the guide pin [6 on the side nearest to the tube punch Ii). The second step is accomplished by pressing down upon the handle bar or lever 2 which acts to force the entire punch carrier downwardly. This pun-ch carrier consists of the upper and lower guide bars 8 and 9, the studs 5 and the nuts thereon including also the tube punch ill. The leather holder ll also moves up and down with the punch carrier. The leather holder l I is normally carried downwardly in advance of the lower end of the punch ID as seen in Figs. 1 and 2 so that the foot I l encounters the leather or other work resting upon the guide plate i5 in advance of the punch. Such foot ll therefore holds the leather in place until the tu e I9 punches a hole through the leather material. In the descending motion of the punch carrier the springs B are compressed as indicated in Fig. 3 so that when the lever 2 is released such springs will automatically return the punch carrier to the upper position which is its normal or original position.

In accordance with the third step of the method, after the hole is punched in the leather the leather is moved laterally of the bed and guide plate l5 so that the recently punched hole is in the new position placed directly under the guide pin it. In other words, after the punching operation the leather is shifted laterally so that the recently punched hole is moved out of registry with the punch Ill and beneath the guide pin l6 which is offset to one vertical side of the path of the punch It. The leather is now positioned in readiness for a repetition of the three steps.

As shown in Fig. 3, during the descent of the punch carrier the foot I l' first contacts the leather upon the guide plate l5. As the carrier further descends the arrested rod 28 is motionless and the lower guide plate 9 slides down upon such rod 253 compressing the spring l4 and raising the detent head 29 above the upper portion of such lower guide plate 9. When the handle or lever 72 is released the coil spring M will react as the punch carrier is elevated to project the foot ll downwardly with reference to the lower guide bar 9 until the detent head 29 strikes the upper end of such bar 9 and arrests this downwardly projelcting motion of the rod 28 and pressure foot It will be noted from Fig. 3 that this pressure foot and its unit are carried at the side of the punch Id opposite to that on which the gauge pin it lies. Thus between the pin and foot H the leather is firmly held in place and prevented from creeping when the punch is driven downwardly.

As shown in Fig. 4 the punch it may be a tube with a threaded portion 33 screwed into an internally threaded opening in the lower guide bar 9.

While I have herein illustrated and described the best form of the invention known to me at this time, it is to be understood that the drawings illustrate only one embodiment of which the invention is susceptible and I reserve the right to all such changes and modifications as may be embraced within the scope of the following claims.

I claim:

1. A leather perforating machine comprising a, punch, a punch carrier supporting said punch and having reciprocating movement, a guide plate for receiving the leather to be operated on by said punch, a support for the guide plate, means on the guide plate to one side of the punch path for holding the leather and gauging the same in its position on said guide plate, and holding means for the leather carried by said carrier and disposed on the opposite side of said punch.

2. An improved leather perforating machine comprising a guide plate for receiving the leather having a gauge pin projecting therefrom for receiving the leather, a punch reciprocating in a path at one side of said pin, a reciprocating punch carrier carrying said punch, means to actuate said carrier, and a leather holding member movably carried by said carrier on the opposite side of said punch.

3. A leather perforating machine as claimed in claim 2 characterized by the fact that said guide plate is adjustable upon the bed of the machine.

4. A leather perforating machine according to claim 2 in which the guide plate is slotted and fastening members engage the slotted portions of the plate and extend into the bed of the machine for adjustably aflixing the guide plate to such bed, said guide plate having a substantially vertical flange and said leather engaging pin extending approximately horizontally from said flange.

5. A leather perforating machine comprising a punch carrier including reciprocating studs, guide plates carried by said studs, a head of the machine through which said studs reciprocate, coil springs between the head and upper guide plate, a punch carried by the lower guide plate, a bed for the machine for receiving the leather and having a punch socket therein, and means for driving the punch carrier downwardly.

6. An improved leather perforating machine comprising a leather punch, a leather punch carrier comprising studs mounted to reciprocate in the machine and having shouldered and reduced and threaded end portions, upper and lower guide plates fitted over said end portions and against said shouldered parts, nuts threaded on the studs outwardly of the guide plates, coil springs wound about the studs between the machine and the upper guide plate, a tube punch carried by the central portion of the lower guide plate, and means carried by the central portion of the upper guide plate for receiving the actuating means of the machine.

7. A leather perforating machine comprising a machine body, a support thereon, a hand pin on the support, a hand lever coupled by said pin to said support and having a substantially vertical angular movement about said hand pin, a substantially vertically reciprocating punch carrier supported by said machine body, a punch carried by said carrier, an Allan screw threaded adjustably into said carrier and having its socketed end presented uppermost, said lever being so constructed and arranged and so fulcrumed upon said hand pin as to enable the lever to be swung upwardly through a large angle to expose and leave free the upper socketed end of said Allan screw and a wrench for engaging in the socket of the screw to rotate and adjust the same.

GEORGE P. CARLOCK.

REFERENCES CITED Number Number 

